SLC 500 Analog Input Modules

Transcription

1 Installation Instructions SLC 500 Analog Input Modules (Catalog Numbers 1746NI16I and 1746NI16V) Inside Important User Information... 2 For More Information...3 Hazardous Location Considerations... 4 Environnements dangereux... 4 Electrostatic Damage NI16 Power Requirements... 5 Module Location in Chassis... 6 Heat and Noise Considerations... 6 Module Installation and Removal... 7 Terminal Wiring... 9 Input Devices Transducer Source Impedance Specifications... 15

2 2 SLC 500 Analog Input Modules Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, AllenBradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication. AllenBradley publication SGI1.1, Safety Guidelines for the Application, Installation and Maintenance of SolidState Control (available from your local AllenBradley office), describes some important differences between solidstate equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication. Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of Rockwell Automation, is prohibited. ATTENTION! Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attention statements help you to: identify a hazard avoid the hazard recognize the consequences IMPORTANT Identifies information that is critical for successful application and understanding of the product.

3 SLC 500 Analog Input Modules 3 For More Information For detailed information on planning and installing your system, see the following publications: Publication Publication Number Industrial Automation Wiring and Grounding Guidelines SLC 500 Analog Input Modules User Manual 1746UM001AUSP SLC 500 Modular Hardware Style Operation and Installation Manual SLC 500 Fixed Hardware Style Operation and Installation Manual If you would like a manual, you can: download a free electronic version from the internet: purchase a printed manual by: contacting your local distributor or Rockwell Automation representative visiting and placing your order calling (USA/Canada) or (Outside USA/Canada)

4 4 SLC 500 Analog Input Modules Hazardous Location Considerations This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or nonhazardous locations only. The following ATTENTION statement applies to use in hazardous locations. WARNING! EXPLOSION HAZARD Substitution of components may impair suitability for Class I, Division 2. Do not replace components or disconnect equipment unless power has been switched off. Do not connect or disconnect components unless power has been switched off. This product must be installed in an enclosure. Environnements dangereux Cet équipement est conçu pour être utilisé dans des environnements de Classe 1, Division 2, Groupes A, B, C, D ou non dangereux. La mise en garde suivante s applique à une utilisation dans des environnements dangereux. MISE EN GARDE! DANGER D EXPLOSION La substitution de composants peut rendre cet équipement impropre à une utilisation en environnement de Classe 1, Division 2. Ne pas remplacer de composants ou déconnecter l'équipement sans s'être assuré que l'alimentation est coupée. Ne pas connecter ou déconnecter des composants sans s'être assuré que l'alimentation est coupée. Ce produit doit être installé dans une armoire.

5 SLC 500 Analog Input Modules 5 Electrostatic Damage Electrostatic discharge can damage semiconductor devices inside this module if you touch backplane connector pins. Guard against electrostatic damage by observing the following precautions. ATTENTION! Electrostatic discharge can degrade performance or cause permanent damage. Handle the module as stated below. Wear an approved wrist strap grounding device when handling the module. Touch a grounded object to rid yourself of electrostatic charge before handling the module. Handle the module from the front, away from the backplane connector. Do not touch backplane connector pins. Keep the module in its staticshield bag when not in use, or during shipment. 1746NI16 Power Requirements The 1746NI16 module receives its power through the SLC 500 chassis backplane from the fixed or modular 5V dc/24v dc chassis power supply. The 5V dc backplane supply powers the SLC circuitry and the 24V dc backplane supply powers the module analog circuitry. The maximum current drawn by the module is shown in the table below. 5V dc Amps 24V dc Amps 125 ma 75 ma When you are using a modular system configuration, add the values shown in the table above to the requirements of all other modules in the SLC chassis to prevent overloading the chassis power supply.

6 6 SLC 500 Analog Input Modules Module Location in Chassis Modular Chassis Considerations Place your 1746NI16 module in any slot of an SLC 500 modular, or modular expansion chassis, except for the extreme left slot (slot 0) in the first chassis. This slot is reserved for the processor or adapter modules. Operating Temperature Range 0 C to 60 C (32 F to 140 F) Fixed Expansion Chassis Considerations IMPORTANT The 2slot, SLC 500 fixed I/O expansion chassis (1746A2) supports only specific combinations of modules. If you are using the 1746NI16 module in a 2slot expansion chassis with another SLC I/O or communication module, refer to the 1746NI16 user manual to determine whether the combination can be supported. Heat and Noise Considerations Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. Analog inputs are highly susceptible to electrical noise. Electrical noise coupled to the analog inputs reduces the performance (accuracy) of the module. Group your modules to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a slot for the analog input module. Position the module: in a slot away from sources of electrical noise such as hardcontact switches, relays, and AC motor drives away from modules which generate significant radiated heat, such as the 32point I/O module (series C or earlier) In addition, route shielded twisted7pair analog input wiring away from any highvoltage I/O wiring.

7 SLC 500 Analog Input Modules 7 Module Installation and Removal When installing the module in a chassis, it is not necessary to remove the terminal block from the module. However, if the terminal block is removed, use the writeon label (shown below) located on the side of the terminal block to identify the module location and type. SLOT MODULE RACK ATTENTION! Remove power before removing or inserting this module. When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by: sending an erroneous signal to your system s field devices, causing unintended machine motion causing an explosion in a hazardous environment Electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance. Terminal Block Removal 1. Loosen the two terminal block release screws. Terminal Block Release Screws 2. Grasp the terminal block at the top and bottom and pull outward and down.

8 8 SLC 500 Analog Input Modules Module Installation Procedure 1. Align the circuit board of the analog input module with the card guides located at the top and bottom of the chassis. 2. Slide the module into the chassis until both top and bottom retaining clips are secured. Apply firm even pressure on the module to attach it to its backplane connector. Never force the module into the slot. 3. Cover all unused slots with the Card Slot Filler, Catalog Number 1746N2. Top and Bottom Module Release(s) Card Guide Module Removal Procedure 1. Press the releases at the top and bottom of the module and slide the module out of the chassis slot. 2. Cover all unused slots with the Card Slot Filler, Catalog Number 1746N2.

9 SLC 500 Analog Input Modules 9 Terminal Wiring The 1746NI16 module contains an 18position, removable terminal block. The terminal pinout is shown below. ATTENTION! Disconnect power to the SLC before attempting to install, remove, or wire the removable terminal wiring block. To avoid cracking the removable terminal block, alternate the removal of the slotted terminal block release screws. Terminal Block (Terminal Block Spare Part Catalog Number 1746RT25G) Channel 0 Channel 2 Channel 4 Channel 6 Analog Com Channel 8 Channel 10 Channel 12 Channel 14 Channel 1 Channel 3 Channel 5 Channel 7 Analog Com Channel 9 Channel 11 Channel 13 Channel 15 Terminal Block Release Screw Maximum Torque = 0.7 to 0.9 Nm (6 to 8 inlbs.) Prewired Cables and Terminal Blocks The following 1492 cables and terminal blocks are available to assist in wiring the 1746NI16 module: AllenBradley Prewired Cables AllenBradley User Terminal Blocks 1492ACAB005A46, 0.5m (1.6 ft. 1492ACAB010A46, 1.0 m (3.3 ft.) 1492ACAB025A46, 2.5 m (8.2 ft.) 1492ACAB050A46, 5.0 m (16.4 ft.) 1492AIFM AIFM16F3

10 10 SLC 500 Analog Input Modules Wiring SingleEnded Inputs The diagram below shows typical wiring for the 1746NI16V module. Channel 0 Voltage Transmitter Channel 2 Voltage Transmitter Channel 4 Voltage Transmitter Channel 6 Voltage Transmitter Vdc power supply (5) (2) (2) (2) (2) (1) IN0 IN2 IN4 IN6 Analog Com IN8 IN1 IN3 IN5 IN7 Analog Com IN9 (1) (3) Optional second Vdc power supply (6) IN10 IN12 IN11 IN13 (3) (3) (4) IN14 IN15 (3) (1) There are two common terminals for all of the 16 voltage inputs. These two analog common terminals are connected internally. (2) All shield wires should be connected to chassis mounting screws. (3) Unused channels should be connected to the analog common terminals (0 Volts). (4) If separate shielded cables are used for each analog input channel, interposing terminal blocks are needed to terminate up to 16 common wires. Then 1 to 4 common wires should be wired from the interposing terminal block to the 2 common terminals on the 1746NI16V module. (5) The module does not provide loop power for analog inputs. Use a power supply that matches the transmitter specifications. (6) More than one power supply can be used if all supplies are class 2. NOTE Although the above diagram has 12 unused inputs, only 4 channels are shown connected to the Analog Com as an example.

11 SLC 500 Analog Input Modules 11 Wiring SingleEnded Inputs The diagram below shows typical wiring for the 1746NI16I module. Channel 0 2wire current Transmitter Channel 2 2wire current Transmitter Channel 4 2wire current Transmitter Channel 6 3wire current Transmitter Vdc power supply (5) (2) (2) (2) (2) IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 Analog Analog Com Com (1) (1) IN8 IN9 (3) Optional second Vdc power supply (6) IN10 IN12 IN11 IN13 (3) (3) (1) There are two common terminals for all of the 16 current inputs. These two analog common terminals are connected internally. (2 All shield wires should be connected to chassis mounting screws. (3) Unused channels should be connected to the analog common terminals (0 Volts). (4) If separate shielded cables are used for each analog input channel, interposing terminal blocks are needed to terminate up to 16 common wires. Then 1 to 4 common wires should be wired from the interposing terminal block to the 2 common terminals on the 1746NI16I module. (5) The module does not provide loop power for analog inputs. Use a power supply that matches the transmitter specifications. (6) More than one power supply can be used if all supplies are class 2. IN14 IN15 NOTE Although the above diagram has 12 unused inputs, only 4 channels are shown connected to the Analog Com as an example. (4) (3)

12 12 SLC 500 Analog Input Modules Wiring Guidelines ATTENTION! To prevent shock hazard, care should be taken when wiring the module to analog signal sources. Before wiring any analog module, disconnect power from the SLC 500 system and from any other source to the analog module. Follow the guidelines below when planning your system wiring. To limit noise, keep signal wires as far away as possible from power and load lines. To ensure proper operation and high immunity to electrical noise, always use Belden 8761 (shielded, twisted pair) or equivalent wire. Connect the shield drain wire to the earth ground of the chassis. Tighten terminal screws using a standard or crosshead screwdriver. Each screw should be turned tight enough to immobilize the wire s end. Excessive tightening can strip the terminal screw. The torque applied to each screw should not exceed 0.7 to 0.9 Nm (6 to 8 inlb) for each terminal. Follow system grounding and wiring guidelines found in your SLC 500 Modular Hardware Style Installation and Operation Manual, publication

13 SLC 500 Analog Input Modules 13 Input Devices Transducer Source Impedance If the source impedance of the input device and associated cabling is too high, it will affect the accuracy of the channel data word. Source impedance of 2000 ohms will produce up to 0.01% of module error over and above the specified accuracy of the module. You can compensate for device impedance error by implementing the following equation in your ladder program: V S V measured (R s R in ) R in where: Vs = input device voltage Rs = input device impedance Rin = 1746NI16 input impedance (See Specifications on page 17)

14 14 SLC 500 Analog Input Modules Wiring Input Devices to the 1746NI16 After the analog input module is properly installed in the chassis, follow the wiring procedure below using Belden 8761 cable. ATTENTION! Care should be taken to avoid connecting a voltage source to a current input module. Improper module operation or damage to the voltage source can occur. Cable Signal Wire (Cut foil shield and drain wire.) Foil Shield Drain Wire Signal Wire (Twist the drain wire and the foil shield together and connect to earth ground or to the chassis mounting screws.) To wire your 1746NI16 module follow these steps. 1. At each end of the cable, strip some casing to expose the individual wires. 2. Trim the signal wires to 50 mm (2 inch) lengths. Strip about 5 mm (3/16 inch) of insulation away to expose the end of the wire. 3. At one end of the cable, twist the drain wire and foil shield together. 4. At the other end of the cable, cut the drain wire and foil shield back to the cable. 5. Connect the signal wires to the 1746NI16 terminal block or interposing terminal block. 6. Connect the shield drain wire to chassis ground. 7. Connect the other end of the cable to the voltage or current transmitter terminals. 8. Repeat steps 1 through 7 for each channel on the module.

15 SLC 500 Analog Input Modules 15 Specifications Electrical Specifications Description Specification Backplane Current Consumption 125 ma at 5V dc 75 ma at 24V dc Backplane Power Consumption 2.425W maximum (0.625W at 5V dc, 1.8W at 24V dc) Number of Channels 16 (backplane isolated) I/O Chassis Location Any I/O module slot except slot 0 A/D Conversion Method Sigma Delta Input Filtering Lowpass digital filter with programmable filter frequencies Normal Mode Rejection (between [] input and [ ] input) Common Mode Rejection (between inputs and chassis ground) Input Filter Frequencies Isolation CommonMode Voltage Range >80 db at 50/60 Hz >75 db at dc >100 db at 50/60 Hz Greater than or equal to 75 db at DC Greater than or equal to 100 db at 50/60 Hz 6 Hz, 10 Hz, 20 Hz, 40 Hz, 60 Hz, 80 Hz, 100 Hz, 250 Hz 500V ac isolation for 1 second ±10.25V relative to analog common terminal (20.5V maximum between any two signal input terminals)

16 16 SLC 500 Analog Input Modules Physical Specifications Description Specification LED Indicators 5 green status indicators one for each group of 4 channels and one for module status Module ID Code Class 1 Class 3 NI16V NI16I Recommended Cable Belden #8761 or equivalent Maximum Wire Size Two 14 AWG wires per terminal Maximum Cable Impedance Terminal Block AllenBradley Prewired Cables NI16V NI16I AllenBradley User Terminal Blocks Voltage Source (with less than 10Ω impedance): 1250Ω maximum loop impedance, for <1LSB error Current Source (transmitter properly wired to its power supply): 249Ω maximum loop impedance, to meet commonmode voltage requirements Removable, AllenBradley spare part Catalog Number 1746RT25G 1492ACAB005A46, 0.5m (1.6 ft.) 1492ACAB010A46, 1.0 m (3.3 ft.) 1492ACAB025A46, 2.5 m (8.2 ft.) 1492ACAB050A46, 5.0 m (16.4 ft.) 1492AIFM AIFM16F3 Environmental Specifications Description Operating Temperature Storage Temperature Relative Humidity Agency Certification Hazardous Environment Classification Specification 0 C to 60 C (32 F to 140 F) 40 C to 85 C (40 F to 185 F) 5% to 95% (without condensation) UL listed CUL approved CE compliant for all applicable directives Class I Division 2 Hazardous Environment Groups A, B, C, D

17 SLC 500 Analog Input Modules 17 Input Specifications Description Specification Type of Input (Selectable) NI16V ±10V dc, 1 to 5V, 0 to 5V, or 0 to 10V NI16I ±20 ma, 4 to 20 ma, 0 to 1 ma, 0 to 20 ma Type of Data (Selectable) Engineering Units (1 mv/step or 1 µa/step) ScaledforPID (0 to 16,383 range) Proportional Counts (32,768 to 32,767 range) Proportional Counts (User Defined Range, Class 3 only) 1746NI4 Data Format Input Impedance NI16V 20 MΩ NI16I 249 Ω Maximum Voltage Input NI16V ±30V between any two signal terminals without damage Maximum Voltage Input NI16I ±8V between any two signal terminals without damage Current Input (maximum) ±30 ma (Between analog com and any input terminal) Time to Detect Open Circuit Less Than 5 seconds Module Update Time (1) Input Resolution NI16V 312 µv (2) NI16I 640 na Display Resolution 1 mv or 1 µa Module Error Over Full NI16V Temperature Range (0 C to 60 C, 32 F to 140 F) NI16I Voltage input types (±10V dc, 1 to 5V dc, 0 to 5V dc, 0 to 10V dc): ±0.1% Current input types (0 to 20 ma, 4 to 20 ma, 0 to 1mA, ±20 ma): ±0.3% Input Offset Drift with NI16V 90 µv/ C Temperature NI16I 360 na/ C Gain Drift with Temperature NI16V 15 ppm/ C NI16I 20 ppm/ C Calibrated Accuracy at 25 C NI16V Better than 0.05% of range NI16I Better than 0.15% of range (1) Depends on filter selected. Refer to the 1746NI16 User Manual, publication 1746UM001AUSP. (2) Depends on data mode: Engineering Units or Proportional Counts.

18 18 SLC 500 Analog Input Modules Notes:

19 SLC 500 Analog Input Modules 19

20 SLC 500 is a trademark of Rockwell Automation. Belden is a trademark of Belden, Inc. December 1999 Supersedes Publication 1746IN001AUSP September 1999 PN (C) 2006 Rockwell Automation, Inc. Printed in Singapore.